hello,im new here,just got for first time nav2012 and im having some trouble install it.i have win7 32 bit,ive downloaded nav but when i try run the program it shows an error message like navdownloader is not a valid win32 app.i used avast before but i unistall it,now i cant run nav ,have no other av and im kinda sure my laptop is already infected.i tried get some support and i was told to get norton tool removal and this program dont download complete.im not a profi so pls have some understandin,i need badly help.ty